JP6338472B2 - Movement restriction release mechanism and vibration control device and slide support using the same - Google Patents

Description

  The present invention relates to a movement restriction releasing mechanism mainly applied to a civil engineering structure and a building structure, and a vibration damping device and a sliding bearing using the same.

  Civil engineering structures such as bridges and building structures such as office buildings are equipped with sliding supports that reduce the input of seismic energy and vibration control devices that reduce vibrations by absorbing vibrations caused by disturbances such as earthquakes and winds. Is done.

  Of these, the sliding bearings are installed between the upper structure and the foundation or lower structure that supports the upper structure, that is, between the building body and the foundation for office buildings and between the bridge girder and pier for bridges. In operation, the relative movement is permitted by the sliding movement, and as a result, the seismic input is blocked or suppressed.

  The vibration control device is installed in the same place as the sliding bearing, and the column base braces placed between the upper and lower beams and on the vertical structure and the stigma at the diagonal position. It is installed between the side braces, etc., and during operation, the damping effect is exerted by the relative movement that occurs in them, and hysteresis damping such as speed-dependent dampers such as oil dampers, elastic-plastic dampers, friction dampers, etc. A type damper is known.

  These sliding bearings and hysteretic dampers are designed and manufactured to operate optimally when the disturbance is large, but if they operate even when the disturbance is small, they will remain even when subjected to small and medium earthquakes or normal winds. There is a concern that deformation will occur, and in the speed-dependent damper, there is a concern that discomfort due to shaking of the structure frequently occurs.

JP2013-36215A

  As a countermeasure in such a case, in the field of sliding bearings, when the magnitude of the disturbance is below a predetermined threshold, the above-described sliding motion is limited, and the magnitude of the disturbance is a threshold. There is known a movement restriction release mechanism configured to release the restriction state when the value reaches or exceeds the value.

  For example, Patent Document 1 discloses a knock-off bolt configured to be broken at a predetermined shear load. According to the document, by installing the above-described knock-off bolt on a support portion of a bridge, It is stated that the bearing can be fixed up to level 1 ground motion and movable during level 2 earthquakes.

  However, the above-described knock-off bolt is installed on each plate when the base end side of the knock-off bolt is inserted into one of the upper structure side slide plate and the lower structure side slide plate and the distal end side is inserted into the other. If there is a slack between the bolt hole and the bolt hole, a time lag occurs until the load is transmitted to the knock-off bolt by an amount corresponding to the slack, and the timing for releasing the movement restricted state is delayed.

  For this reason, there is a risk that the operation of the sliding bearing will be delayed and the seismic input blocking or suppressing action that was planned at the time of design may not be fully exerted. There is a possibility that the vibration action may not be sufficiently exerted, and when trying to avoid them, high accuracy is required for processing or drilling of the knock-off bolt and its bolt hole, and as a result, the installation cost of the movement restriction release mechanism is expensive. The problem of becoming.

  The present invention has been made in consideration of the above-described circumstances, a movement restriction release mechanism capable of preventing looseness in a movement restriction state while suppressing manufacturing costs and installation costs, and a vibration damping device using the same. The purpose is to provide sliding support.

  In order to achieve the above object, the movement restriction releasing mechanism according to the present invention is fitted into a recess formed in one of the two attachment parts that move relative to each other as described in claim 1. The projecting portion is provided on the first coupling portion coupled to the other mounting portion, or the other coupling portion is fitted to the recess formed in the second coupling portion coupled to the one mounting portion. And a first connecting part connected to the other mounting part, and a shear load acting on the protruding part from the recess as the two mounting parts move relative to each other. A cross-sectional defect portion is formed in the vicinity of the proximal end side of the protruding portion so that the protruding portion is broken, and on the opposite surface of the inner surface of the concave portion that faces along the relative movement direction of the two attachment portions. Two abutments that abut each other Are provided on the outer surface of the projecting portion so as to be back-to-back with each other, and one of the two contact surfaces is a tapered surface and the other is a tapered surface or an upright surface, and the first connecting portion and the other High strength inserted through a bolt hole formed in the one attachment part or the other attachment part, at least one of the connection with the attachment part and the connection between the second connection part and the one attachment part. Friction welding with bolts.

  Further, a vibration damping device according to the present invention is a vibration damping device provided with the movement restriction releasing mechanism according to claim 1, wherein the relative movement input portion of the vibration damping device is the one attachment portion and the other attachment portion, respectively. It is an attachment part.

  Further, the vibration damping device according to the present invention includes a friction plate on which the friction material sliding on the sliding surface of the sliding material attached to the one attachment portion and the sliding plate is attached. The other attachment site, or the friction plate as the one attachment site and the sliding plate as the other attachment site.

  Further, a sliding bearing according to the present invention is a sliding bearing provided with the movement restriction releasing mechanism according to claim 1, wherein the relative movement input parts of the sliding bearing are respectively the one attaching part and the other attaching part. It is a thing.

[First invention]
In the movement restriction releasing mechanism according to the present invention, of the two attachment parts that move relative to each other, a recess is formed on the side of one attachment part, and the projecting portion that fits into the recess is the other attachment part. The cross-sectional defect part is formed in the vicinity of the base end side of the projecting part so that the projecting part is broken by a shear load accompanying relative movement, but there are two attachment sites on the inner surface of the recess. The two opposing contact surfaces that are in contact with each other along the direction of relative movement are provided so that the two contact surfaces that contact the opposing surfaces are back to back on the outer surface of the protruding portion. One of the surfaces is a tapered surface and the other is a tapered surface or an upright surface. During installation, the protruding portion is pushed into the concave side until the abutting surface of the protruding portion contacts the opposite surface of the concave portion. After contact, attach to one attachment site or the other By friction bonding by made a inserted into the bolt holes have been high strength bolt, the second one attachment site connecting portion, or respectively connect the first connecting portion to the other mounting parts.

  If it does in this way, a protrusion part and a recessed part will be connected without loosening only by inserting a protrusion part in a recessed part.

  Therefore, when the protruding portion breaks when a breaking load or a shear load exceeding it is applied and the relative movement restriction between the two attachment parts is released, the protruding portion and the recess are connected without looseness. There is almost no time lag until the shear load input to the two attachment sites is transmitted to the projecting portion and the recess, and the projecting portion has the above-described shear load input to the two attachment sites. Break almost simultaneously.

  Therefore, there is no possibility that the timing of releasing the movement restriction state and thus the timing of starting the operation of the vibration damping device will be delayed, and thus the vibration damping action planned at the time of design is surely exhibited.

  In addition, since the connection between the first connecting portion and the other attachment portion or the connection between the second connection portion and the one attachment portion is a friction joint using a high-strength bolt, the bolt hole is formed larger than the bolt, By the amount of the play, the position of the first connecting portion with respect to the other mounting portion and the position of the second connecting portion with respect to the one mounting portion can be adjusted along two directions orthogonal to the hole axis, and thus the protruding portion The abutment surface can be reliably abutted against the opposing surface of the recess.

The arrangement configuration of the recessed portion and the protruding portion is as follows:
(a) A concave portion is formed in one attachment site, and a projecting portion is provided in a first connection portion connected to the other attachment site.
(b) A recess is formed in the second connecting portion connected to one attachment site, and a protruding portion is provided in the other attachment site.
(c) The concave portion is formed in the second connecting portion connected to one attachment site, and the projecting portion is provided in the first connecting portion connected to the other attachment site, so that an appropriate selection is made. Can do.

  Here, in the case of (a), the first connecting portion is connected to the other mounting portion by friction welding with a high-strength bolt inserted through a bolt hole formed in the other mounting portion, (b) In this case, the second connecting portion may be connected to the one attachment site by friction bonding with a high-strength bolt inserted into a bolt hole formed in the one attachment site.

  On the other hand, in the case of (c), as described above, the first connecting portion and the second connecting portion may be connected to the other attachment portion and the one attachment portion, respectively, by friction welding using high-strength bolts. However, since it is sufficient that the position of at least one of the first connecting portion and the second connecting portion can be adjusted, one of the first connecting portion and the second connecting portion is connected by normal bolt joining or welding. You may do it.

  In addition, the structure which forms a recessed part in one attachment site | part, and provides a protrusion part in the other attachment part excludes from the present invention because the position alignment at the time of a fitting with a recessed part and a protrusion part cannot be performed. .

[Second invention]
The movement restriction release mechanism according to the first aspect of the present invention can be provided in the vibration control devices in the form that the relative movement input parts of the vibration control device are the two attachment parts described above. When a shear load greater than the breaking load is input to the two attachment parts, the movement restriction release mechanism may be delayed due to the effect of the movement restriction release mechanism that the protruding portion breaks almost simultaneously without causing a time lag. Thus, the vibration damping device can be operated promptly.

  The damping device to be applied is arbitrary, and can be widely applied to hysteresis damping dampers such as friction dampers, lead dampers, elastic-plastic dampers, and speed-dependent dampers such as oil dampers, viscous dampers, and viscoelastic dampers. .

For example, if applied to a friction damper,
(a) Configuration with the sliding plate as one mounting site and the friction plate as the other mounting site
(b) The friction plate may be configured as one attachment site and the sliding plate as the other attachment site.

[Third invention]
The movement restriction releasing mechanism according to the first aspect of the present invention can be provided in the vibration damping devices in the form that the relative movement input parts of the sliding bearing are the above-described two attachment parts. When a shear load greater than the load is input to the two attachment parts, the movement restriction release mechanism may be delayed due to the effect of the movement restriction release mechanism that the protruding portion breaks almost simultaneously without causing a time lag. Thus, the sliding bearing can be operated quickly.

  The sliding bearing includes not only a sliding bearing in a narrow sense that performs only sliding operation, but also an elastic sliding bearing combined with rubber.

The disassembled perspective view of the friction damper 1 using the movement restriction release mechanism 20 according to the first embodiment. 4A and 4B are detailed views of a movement restriction release mechanism 20, where (a) is a perspective view and (b) is a front view. It is the figure which showed the attachment condition of the movement restriction release member 21, (a) is a front view, (b) is sectional drawing along the AA. Explanatory drawing which showed the mode after movement restrictions were cancelled | released. The whole perspective view of the friction damper 51 concerning a modification. The perspective view of the movement restriction release mechanism concerning a modification. The perspective view of the movement restriction release mechanism concerning another modification. It is the figure which showed the modification of a protrusion part and a recessed part, (a) is a perspective view, (b) is a front view. It is the figure of the sliding bearing 91 using the movement restriction release mechanism 20a which concerns on 2nd Embodiment, (a) is a whole perspective view, (b) is a vertical sectional view. It is detail drawing of the movement restriction release mechanism 20a, (a) is a perspective view, (b) is a front view.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a movement restriction releasing mechanism, a vibration damping device using the same, and a sliding support according to the present invention will be described with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is an exploded perspective view showing a friction damper as a vibration damping device according to the present embodiment. The friction damper 1 according to the present embodiment is an example of a case where the friction damper 1 is installed on a brace material made of H-section steel arranged in a ramen viaduct substructure or an office building (both not shown). The brace material 2a extending from the non-column beam joint and the brace material 2b extending from another column beam joint located diagonally to the column beam joint are interposed between the brace material 2a and the brace material 2a. The sliding plate 3 as the other attachment portion and the friction plate 4 as one attachment portion connected to the brace material 2b are provided. Here, the sliding plate 3 and the friction plate 4 function as a relative movement input portion of the friction damper 1.

  The sliding plate 3 is configured on the left and right sides of the upper and lower flanges that are part of the brace material 2a (the sliding plate of the lower flange is omitted in the figure), and the front and back surfaces are configured with stainless steel plates. Each of the sliding members 5 is attached.

  The friction plate 4 is connected to the brace material 2b by a bolt joint on the base end side, and the friction plate 4 responds to the relative displacement when a relative axial displacement occurs in the brace materials 2a and 2b on the distal end side. A friction material 6 that slides on the sliding surface of the sliding material 5 is attached.

  The friction material 6 can be configured by, for example, laminating a phenol resin on a stainless steel substrate.

  The sliding material 5 and the friction material 6 are so-called two-surface friction types arranged symmetrically on the front side and the back side of the flange, and a total of four sets are installed on the left and right sides of the upper and lower flanges.

  A bolt hole 7 is formed in the friction plate 4 so as to penetrate the vicinity of the center of the friction material 6, a slit 8 is provided in the sliding material 5, and a slit 9 is provided in the sliding plate 3. The high-strength bolt 10 fitted with the pedestal 11 is sequentially inserted from the rear side of the flange into the bolt hole 7 of the friction plate 4 and the slit 8 of the sliding member 5, and further inserted into the slit 9 of the sliding plate 3, The slit 8 of the sliding member 5 arranged on the front side and the bolt hole 7 of the friction plate 4 are sequentially inserted, the disc spring 12 and the pedestal 13 are fitted to the tip of the high-strength bolt, and the nut 14 is inserted from above. By screwing and tightening, the relative movement between the sliding plate 3 and the friction plate 4 is not restricted, and each friction material 6 is pressed against the corresponding sliding material 5.

  The friction damper 1 is provided with a movement restriction releasing mechanism 20 according to this embodiment, and a total of eight are provided on the front and back sides of the flange, one on each side of the upper and lower flanges (in the figure, 4 on the left and right sides of the lower flange). Are omitted).

  The movement restriction release mechanism 20 is configured to connect a movement restriction release member 21 composed of a connecting portion 23 as a first connecting portion and a protruding portion 24 extending from the connecting portion via the connecting portion 23. 3, and the projecting portion 24 is configured to fit into a recess 22 formed in the friction plate 4.

  As shown in FIG. 2A, the projecting portion 24 has a base end so that the projecting portion is broken by a shear load acting from the recess 22 as the sliding plate 3 and the friction plate 4 move relative to each other. A slit-like cross-sectional defect 31 is formed in the vicinity of the side.

  What is necessary is just to form the cross-sectional defect | deletion part 31 suitably so that the cross-sectional area of the protrusion part 24 in the position may become a magnitude | size according to a desired breaking load.

  On the outer surface of the projecting portion 24, the opposing surfaces 32, 32 that face each other along the relative movement direction of the sliding plate 3 and the friction plate 4 (in the direction of the white arrow in the figure), of the inner surface of the recess 22, respectively. The two contact surfaces 33 and 33 in contact with each other are provided so as to be back to back.

  Here, the protruding portion 24 is configured such that the contact surfaces 33 and 33 are tapered surfaces, and the concave portion 22 is configured such that the opposing surfaces 32 and 32 are inclined surfaces corresponding to them. is there.

  In addition, when the projecting portion 24 is fitted into the recess 22, the contact surfaces 33, 33 of the projecting portion are shown in FIG. As described above, the shapes of the projecting portion 24 and the recessed portion 22 are appropriately determined so that the connecting portion 23 does not contact the friction plate 4 and the tip of the projecting portion 24 does not contact the bottom surface of the recessed portion 22.

  On the other hand, bolt holes 34, 34 are drilled in the connecting portion 23, and bolt holes 35, 35 are drilled in the sliding plate 3. The high-strength bolts 25, 25 are shown in FIG. In a), the bolts 34 and 34 of the connecting portion 23 of the movement restriction releasing member 21 located on the near side are inserted into the bolt holes 35 and 35 of the sliding plate 3, and in FIG. 2A, the sliding plate 3 is sandwiched by being similarly inserted into the bolt holes 34 of the connecting portion 23 of another movement restriction releasing member 21 (not shown) located on the back side in FIG. The two movement restriction releasing members 21 and 21 can be connected to the sliding plate via the connecting portions 23 and 23 by attaching them.

  Here, the bolt holes 35, 35 formed in the sliding plate 3 are formed so that the inner diameter is larger than the outer diameter of the high-strength bolts 25, 25, and the movement restriction releasing member is within the range of play. 21 can be adjusted in two directions within a plane parallel to the sliding plate 3 and the friction plate 4.

  In order to provide the movement restriction releasing mechanism 20 on the friction damper 1, the protruding portion 24 of the movement restriction releasing member 21 is fitted into the recess 22 formed in the friction plate 4 as shown in FIG. The abutment surfaces 33 and 33 of the installation part are brought into contact with the opposing surfaces 32 and 32 of the recess 22 respectively. Although not shown, the movement restriction releasing member 21 is similarly arranged on the opposite side of the sliding plate 3.

  At this time, the bolt hole 35 of the sliding plate 3 is formed larger than the outer diameter of the high-strength bolt 25, so that the movement restriction releasing member 21 is shown in the range x, y shown in FIG. It is possible to adjust the position in the direction, and the contact surfaces 33, 33 of the projecting portion 24 can be reliably brought into contact with the opposing surfaces 32, 32 of the recess 22, respectively.

  Next, while maintaining the above-mentioned contact state, as shown in FIG. 4B, the high strength bolt 25 is positioned on the left side of the sliding plate 3 after passing the washer 36 through the high strength bolt 25. After passing through the bolt hole 34 of the connecting portion 23 of the movement restriction releasing member 21 and then through the bolt hole 35 of the sliding plate 3, the connection of the movement restriction releasing member 21 located on the right side of the sliding plate 3 in FIG. The bolt 23 is inserted into the bolt hole 34 of the portion 23, a washer 36 is passed through the tip, and a nut 26 is screwed into the tip and tightened.

  In this way, the two movement restriction releasing members 21 and 21 are attached to the sliding plate via the connecting portions 23 and 23 with the sliding plate 3 interposed therebetween by friction bonding.

  In the movement restriction release mechanism 20 according to the present embodiment, under the shear load less than the breaking load, the fitting of the projecting portion 24 and the concave portion 22 is maintained, and the relative movement of the sliding plate 3 and the friction plate 4 is restricted. The friction damper 1 does not operate.

  On the other hand, when a breaking load or a shear load exceeding the breaking load is applied, the projecting portion 24 is broken at the cross-sectional defect portion 31, and the relative movement restriction of the sliding plate 3 and the friction plate 4 is released as shown in FIG. The frictional damper 1 is actuated with the relative movement in the arrow direction. In the figure, the broken projecting portion 24 is omitted.

  Here, since the projecting portion 24 and the recess 22 are connected without loosening during movement restriction, the shear load input to the sliding plate 3 and the friction plate 4 is transmitted to the projecting portion 24 and the recess 22. In the meantime, almost no time lag occurs, and the projecting portion 24 breaks almost simultaneously with a shear load greater than the breaking load being input to the sliding plate 3 and the friction plate 4.

  As described above, according to the movement restriction releasing mechanism 20 and the friction damper 1 using the same according to the present embodiment, the protruding portion 24 and the recessed portion 22 are connected without loosening, so that the shear load greater than the breaking load is obtained. Is input to the sliding plate 3 and the friction plate 4, there is almost no time lag until the shear load is transmitted to the projecting portion 24 and the recessed portion 22. Is broken almost simultaneously with the input to the sliding plate 3 and the friction plate 4, and the restriction on the relative movement of the sliding plate 3 and the friction plate 4 is also released at that moment.

  Accordingly, there is no possibility that the timing of starting the operation of the friction damper 1 is delayed, and thus the vibration damping action planned at the time of design is reliably exhibited.

  Further, according to the movement restriction release mechanism 20 according to the present embodiment, the contact surfaces 33, 33 of the projecting portion 24 are tapered surfaces, and the opposing surfaces 32, 32 of the recess 22 are inclined surfaces corresponding to them. Therefore, it is possible to make the contact surfaces 33, 33 of the projecting portion 24 abut on the opposing surfaces 32, 32 of the recess 22 only by fitting the projecting portion 24 into the recess 22, and thus the strict accuracy. Even if it does not process by, the protrusion part 24 and the recessed part 22 can be connected without loosening.

  Further, according to the movement restriction releasing mechanism 20 according to the present embodiment, when connecting the connecting portion 23 to the sliding plate 3, the bolt holes 35, 35 formed in the sliding plate 3 are replaced with the high strength bolts 25, 25. By forming the inner diameter larger than the outer diameter, the movement restriction releasing member 21 can be adjusted in two directions within a plane parallel to the sliding plate 3 and the friction plate 4 within the range of play. The connecting portion 23 and the sliding plate 3 are configured so that the connection strength is ensured by friction welding with a high-strength bolt, so that the protruding portion 24 and the concave portion 22 are surely loosened. It is possible to connect without any problem.

  In the present embodiment, an example in which the so-called two-surface type friction damper 1 is provided with the movement restriction release mechanism 20 has been described. However, the type of the friction damper is arbitrary, and for example, the four-surface type friction damper shown in FIG. Can also be applied.

  As in the above-described embodiment, the friction damper 51 shown in the figure includes a brace material 2a extending from a column beam joint (not shown) and a brace extending from another column beam joint located diagonally to the column beam joint. In this modified example, a pair of sliding plates 52, 52 are arranged so that the flange of the brace material 2a is sandwiched between them, and the base end side of each of the flanges is interposed between the flanges 2b. The friction plates 4 and 4 are arranged outside the pair of sliding plates 52 and 52 so as to sandwich the pair of sliding plates 52 and 52, and the base ends thereof are connected to the respective surfaces of the flange of the brace material 2b. Each sliding plate 52 is attached with sliding material 5 on both sides thereof, and friction material 6 that slides on the sliding surface of sliding material 5 is attached to the back surface of each friction plate 4 and brace material 2b. It is attached to each flange, and the base 11 is The high-strength bolt 10 is inserted into the bolt hole 7 of the friction plate 4 and the slit 9 of the sliding plate 52 and the sliding members 5 and 5 attached to both sides thereof from one side of the flange (left side in the figure). Are inserted through the bolt holes penetrating through the vicinity of the center of the friction material 6 attached to each surface of the flange, and the slit 9 of the sliding plate 52 is similarly formed on the other side of the flange. And the slits 8 and 8 of the sliding members 5 and 5 attached to both sides thereof and the bolt holes 7 of the friction plate 4 are sequentially inserted, and the disc spring 12 and the pedestal 13 are fitted to the tips of the high strength bolts. By screwing and tightening the nut 14 from above, the frictional members 6 correspond to each other without restraining relative movement between the pair of sliding plates 52 and 52 and the pair of friction plates 4 and 4. It comes to be pressed against the sliding surface of each sliding material 5 That.

  Here, the friction damper 51 is provided with a movement restriction release mechanism 20 on the left and right sides of the flange of the brace material 2b, and the connecting portion 23 of the movement restriction release member 21 constituting each movement restriction release mechanism is connected to the brace material 2b. Each of the flanges is connected to each surface of the flange, and a projecting portion 24 extending from the connecting portion is fitted into a recess 22 formed in the friction plate 4.

  Further, bolt holes 34, 34 are drilled in the connecting portion 23, and bolt holes 35, 35 (not shown) are drilled in the flange of the brace material 2b, respectively. Is inserted into the bolt holes 34, 34 of the connecting portion 23 of the movement restriction releasing member 21 arranged in the flange, and then inserted into the bolt holes 35, 35 of the flange of the brace material 2b, and then connected to the right movement restriction releasing member 21. Two movement restrictions are released by inserting the flanges of the brace material 2b by inserting the nuts 26, 26 into the bolt holes 34, 34 of the portion 23 and then tightening the nuts 26, 26 to the ends of the high-strength bolts. The members 21 and 21 are attached to the flange via connecting portions 23 and 23.

  Hereinafter, other configurations and functions and effects are substantially the same as those of the above-described embodiment, and thus description thereof is omitted here.

  Further, in this embodiment, one attachment site where the recess is formed slides on the friction plate 4, and the other attachment site which connects the first connection part provided with the projecting portion fitted to the recess is slid. Although the plate 3 is used, on the contrary, for example, by making the width of the friction plate larger than the width of the sliding plate, one mounting portion where the concave portion is formed is fitted into the sliding plate and the concave portion. The other attachment site for connecting the first connecting portion provided with the protruding portion may be a friction plate.

  Further, in the present embodiment, the projecting portion is provided in the first connecting portion connected to the other mounting portion, and this is fitted into the concave portion formed in the one mounting portion. Then, a recess may be formed in the second connecting portion connected to one attachment site, and a projecting portion provided in the other attachment site may be fitted into the recess.

  FIG. 6 is a detailed perspective view showing such a modification, and the movement restriction releasing mechanism according to the modification includes a movement restriction releasing member 21a formed by forming a recess 22a in the connecting portion 23a as the second connecting portion. While being connected to the sliding plate 3 through the connecting portion, a projecting portion 24 a extending from the edge of the friction plate 4 is fitted into the concave portion.

  The projecting portion 24a has a slit-like cross-sectional defect portion in the vicinity of the base end side so that the projecting portion is broken by a shearing load acting from the recess 22a as the sliding plate 3 and the friction plate 4 move relative to each other. 31 is formed.

  The outer surface of the projecting portion 24a is opposed to the opposing surfaces 32 and 32, which are opposed to each other along the relative movement direction of the sliding plate 3 and the friction plate 4 (the direction of the white arrow in the figure), of the inner surface of the concave portion 22a. The two contact surfaces 33 and 33 in contact with each other are provided so as to be back to back.

  Here, the projecting portion 24a is configured such that the contact surfaces 33, 33 are tapered surfaces, and the recess 22a is configured so that the opposing surfaces 32, 32 are inclined surfaces corresponding to them. is there.

  On the other hand, bolt holes 34, 34 are drilled in the connecting portion 23a, and bolt holes 35, 35 are drilled in the sliding plate 3. As described with reference to FIG. Another movement restriction arranged on the opposite side of the sliding plate 3 after passing through the bolt holes 34, 34 of the connecting portion 23a of the release member 21a and then through the bolt holes 35, 35 of the sliding plate 3 By passing through the bolt holes 34, 34 of the connecting portion 23a of the releasing member 21a (not shown), the two movement restriction releasing members 21a, 21a are interposed via the connecting portions 23a, 23a so as to sandwich the sliding plate 3. And can be connected to the sliding plate.

  Hereinafter, other detailed configurations and operational effects are substantially the same as those of the above-described embodiment, and thus description thereof is omitted here.

  Further, in the present embodiment, the protruding portion is fitted into the recess formed in one attachment site, but instead, a recess is provided in the second connection portion connected to one attachment site. It does not matter if it is formed.

  FIG. 7 is a detailed perspective view showing such a modified example, and the movement restriction releasing mechanism according to the modified example includes a movement restriction releasing member 21b formed by forming a recess 22b in the connecting part 23b as the second connecting part. It is connected to the friction plate 4 through the connecting portion, and the protruding portion 24 of the movement restriction releasing member 21 is fitted into the concave portion.

  Since the configuration and operational effects of the present modification are substantially the same as those of the above-described embodiment, the description thereof is omitted here, but the positioning when fitting the protruding portion 24 to the recess 22b is a movement restriction release. Since the above-described position adjustment function performed between the member 21 and the sliding plate 3 is possible, the connection of the movement restriction releasing member 21b to the friction plate 4 may be appropriately performed by ordinary bolt joining, welding, or the like. .

  Further, in the present embodiment, the contact surfaces 33, 33 of the projecting portion 24 are planar tapered surfaces, and the corresponding surfaces 32, 32 of the corresponding recesses 22 are planar inclined surfaces. As shown in FIG. 4, the projecting portion of the present invention is a projecting portion 24d having a contact surface formed by a tapered surface 33 and an upstanding surface 33d, and the recess of the present invention is formed by an inclined surface 32 and an upstanding surface 32d. The recess 22d may be a recess 22d having a facing surface.

  In the present embodiment, the configuration in which the movement restriction releasing mechanism according to the present invention is provided in the friction damper, which is a vibration damping device, has been described. Instead, as described in the second embodiment, the sliding support is used. It can be set as the structure provided.

[Second Embodiment]
Next, a second embodiment will be described. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 9 is an overall perspective view and a sectional view showing a sliding bearing according to the present embodiment. The sliding support 91 according to the present embodiment is an example of a case where the sliding support 91 is installed between a bridge girder 96 and a pier 92 supporting the bridge girder, and a lower structure side sliding plate 93 attached to the pier 92, A rubber pad 94 bonded to the upper surface of the lower structure side sliding plate, a sliding plate 95 as the other attachment site bonded to the upper surface of the rubber pad, and a sliding material (not shown) attached to the upper surface of the sliding plate A friction material (not shown) that slides on the lower surface and an upper structure side sliding plate 97 as one attachment portion that is attached to the lower surface of the bridge beam 96. Here, the sliding plate 95 and the upper structure side sliding plate 97 function as a relative movement input portion of the sliding support 91.

  The sliding support 91 is a side erected on the lower structure side sliding plate 93 so as to engage with a shoulder provided on the bridge structure orthogonal side of the upper structure side sliding plate 97 (left and right sides in FIG. 9B). Blocks 98 and 98 are provided, and the upper structure side sliding plate 97, and thus the bridge girder 96 is restricted from moving in the direction orthogonal to the bridge axis (left and right in FIG. 9B), The sliding plate 95 can be slid along the bridge axis direction (the direction orthogonal to the paper surface in FIG. 9B).

  The rubber pad 94 can absorb the relative displacement in the bridge axis direction caused by temperature shrinkage or the like by the shear deformation.

  The sliding material can be made of, for example, stainless steel, and the friction material can be made by coating PTFE (polytetrafluoroethylene) on a suitable base material.

  The sliding bearing 91 is provided with a movement restriction releasing mechanism 20a, which is provided on the side perpendicular to the bridge axis of the sliding plate 95.

  As can be clearly seen in FIG. 10, the movement restriction releasing mechanism 20 a is configured to connect the movement restriction releasing member 21 including the connecting portion 23 and the protruding portion 24 extending from the connecting portion via the connecting portion 23. And the projecting portion 24 is configured to fit into the recess 22 formed in the upper structure side slide plate 97.

  The protruding portion 24 has a slit-shaped cross-sectional defect in the vicinity of the proximal end so that the protruding portion is broken by a shearing load acting from the concave portion 22 as the sliding plate 95 and the upper structure side sliding plate 97 move relative to each other. A portion 31 is formed.

  What is necessary is just to form the cross-sectional defect | deletion part 31 suitably so that the cross-sectional area of the protrusion part 24 in the position may become a magnitude | size according to a desired breaking load.

  On the outer surface of the projecting portion 24, the opposing surfaces 32, 32 are opposed to each other along the relative movement direction of the sliding plate 95 and the upper structure side sliding plate 97 (in the direction of the white arrow in the figure). Two contact surfaces 33 and 33 that contact each other are provided so as to be back to back.

  Here, the protruding portion 24 is configured such that the contact surfaces 33 and 33 are tapered surfaces, and the concave portion 22 is configured such that the opposing surfaces 32 and 32 are inclined surfaces corresponding to them. is there.

  In addition, when the projecting portion 24 is fitted into the recess 22, the contact surfaces 33, 33 of the projecting portion are shown in FIG. As described above, the shapes of the projecting portion 24 and the recessed portion 22 are appropriately determined so that the connecting portion 23 does not contact the upper structure side slide plate 97 and the tip of the projecting portion 24 does not contact the bottom surface of the recessed portion 22. To do.

  On the other hand, bolt holes 34, 34 are drilled in the connecting portion 23, and bolt holes 35, 35 are drilled in the sliding plate 95. The high strength bolts 25, 25 are formed on the upper side in FIG. 9, and in FIG. After being inserted into the bolt holes 34, 34 of the connecting portion 23 of the movement restriction releasing member 21 located on the near side and then inserted into the bolt holes 35, 35 of the sliding plate 95, the nuts 26, 26 are screwed onto the tips thereof. Thus, the movement restriction releasing member 21 can be connected to the sliding plate 95 via the connecting portion 23.

  Here, the bolt holes 35, 35 formed in the sliding plate 95 are formed so that the inner diameter is larger than the outer diameter of the high-strength bolts 25, 25, and the movement restriction releasing member 21 is within the range of play. Can be adjusted in two directions within a plane parallel to the sliding plate 95 and the upper structure side sliding plate 97.

  In order to provide the movement restriction releasing mechanism 20a on the slide support 91, the protruding portion 24 of the movement restriction releasing member 21 is fitted into the recess 22 formed in the upper structure side sliding plate 97, and the contact surface of the protruding portion is arranged. 33 and 33 are brought into contact with the opposing surfaces 32 and 32 of the recess 22, respectively.

  At this time, since the bolt hole 35 of the sliding plate 95 is formed larger than the outer diameter of the high-strength bolt 25, it is possible to adjust the position of the movement restriction releasing member 21 in the two directions described above within the range of play. Thus, the abutting surfaces 33, 33 of the projecting portion 24 can be reliably abutted against the opposing surfaces 32, 32 of the concave portion 22, respectively.

  Next, the connecting portion 23 of the movement restriction releasing member 21 may be connected to the sliding plate 95 with the high-strength bolt 25 as described above while maintaining the above-described contact state.

  If it does in this way, the movement restriction release member 21 will be attached to the slip plate 95 via the connection part 23 by friction joining.

  In the movement restriction releasing mechanism 20a according to the present embodiment, under the shear load less than the breaking load, the fitting of the projecting portion 24 and the concave portion 22 is maintained, and the sliding plate 95 and the upper structure side sliding plate 97 are relatively moved. Limited.

  Therefore, the sliding bearing 91 only undergoes a shear deformation operation by the rubber pad 94, and the sliding operation of the upper structure side sliding plate 97 with respect to the sliding plate 95 does not occur.

  On the other hand, when a breaking load or a shear load exceeding the breaking load is applied, the projecting portion 24 is broken at the cross-sectional defect portion 31.

  Therefore, the relative movement restriction of the sliding plate 95 and the upper structure side sliding plate 97 is released, and the upper structure side sliding plate 97 converts the friction material attached to the lower surface thereof to the sliding material attached to the upper surface of the sliding plate 95. While abutting, it moves relative to the sliding plate in such a manner that it slides on the sliding material.

  Here, since the protruding portion 24 and the concave portion 22 are connected without loosening during the movement restriction, the shear load input to the sliding plate 95 and the upper structure side sliding plate 97 is applied to the protruding portion 24 and the concave portion 22. Until the transmission, almost no time lag occurs, and the projecting portion 24 breaks almost simultaneously with a shear load greater than the breaking load being input to the sliding plate 95 and the upper structure side sliding plate 97.

  As described above, according to the movement restriction releasing mechanism 20a and the sliding bearing 91 using the same according to the present embodiment, the projecting portion 24 and the concave portion 22 are connected without loosening, so that the shear load greater than the breaking load is obtained. Is input to the sliding plate 95 and the upper structure side sliding plate 97, there is almost no time lag until the shear load is transmitted to the protruding portion 24 and the recessed portion 22, and the protruding portion 24 The shearing load is broken almost simultaneously with the input of the sliding plate 95 and the superstructure side sliding plate 97, and the relative movement restriction thereof is also released at that moment.

  Therefore, there is no possibility that the start timing of the operation of the sliding bearing 91 is delayed, and thus the seismic motion input blocking action or suppressing action planned at the time of design is reliably exhibited.

  Further, according to the movement restriction releasing mechanism 20a according to the present embodiment, the contact surfaces 33, 33 of the projecting portion 24 are tapered surfaces, and the opposing surfaces 32, 32 of the recess 22 are inclined surfaces corresponding to them. Therefore, it is possible to make the contact surfaces 33, 33 of the projecting portion 24 abut on the opposing surfaces 32, 32 of the recess 22 only by fitting the projecting portion 24 into the recess 22, and thus the strict accuracy. Even if it does not process by, the protrusion part 24 and the recessed part 22 can be connected without loosening.

  Further, according to the movement restriction releasing mechanism 20a according to the present embodiment, when connecting the connecting portion 23 to the sliding plate 95, the bolt holes 35, 35 formed in the sliding plate 95 are connected to the outer sides of the high strength bolts 25, 25. By forming the inner diameter to be larger than the diameter, the movement restriction releasing member 21 can be adjusted in two directions within a plane parallel to the sliding plate 95 and the upper structure side sliding plate 97 within the range of play. Since the connecting strength between the connecting portion 23 and the sliding plate 95 is ensured by friction welding with a high-strength bolt, the protruding portion 24 and the recessed portion 22 are surely not loosened. It becomes possible to connect.

  In the present embodiment, the other attachment site is the slip plate 95, the connecting portion 23 connected to the slide plate 95 is used as the first connection portion, and the protruding portion 24 is provided on this, and the protruding portion is an upper portion that is one of the attachment portions. Although it fits in the recess 22 formed in the structure side slide plate 97, instead of this, a recess is formed in the second connecting portion connected to one attachment site, and the other attachment is made in the recess. You may make it fit the protrusion part provided in the site | part.

  The specific configuration is substantially the same as the modification of the first embodiment described with reference to FIG. 6, and detailed description thereof is omitted, but the sliding plate 3 illustrated in FIG. The friction plate 4 shall be read as the upper structure side sliding plate 97, respectively.

  Further, in the present embodiment, the protruding portion is fitted into the recess formed in one attachment site, but instead, a recess is provided in the second connection portion connected to one attachment site. It does not matter if it is formed.

  The specific configuration is substantially the same as the modification of the first embodiment described with reference to FIG. 7, and detailed description thereof is omitted, but the sliding plate 3 illustrated in FIG. The friction plate 4 shall be read as the upper structure side sliding plate 97, respectively.

  In the present embodiment, the contact surfaces 33 and 33 of the projecting portion 24 are flat tapered surfaces, and the corresponding surfaces 32 and 32 of the corresponding recesses 22 are flat inclined surfaces. Instead, the projecting portion of the present invention is a projecting portion in which a contact surface is configured by a tapered surface and an upright surface, and the concave surface of the present invention is configured by an inclined surface and an upright surface. It does not matter as a concave part.

  The specific configuration is substantially the same as that of the modification of the first embodiment described with reference to FIG. 8, and detailed description thereof is omitted, but the sliding plate 3 illustrated in FIG. The friction plate 4 shall be read as the upper structure side sliding plate 97, respectively.

1,51 Friction damper 3 Sliding plate (the other mounting part)
4 Friction plate (one mounting part)
5 Sliding material 6 Friction material 20, 20a Movement restriction release mechanism 21, 21a, 21b Movement restriction release member 22, 22a, 22b, 22d
Concave portion 23 connecting portion (first connecting portion)
23a, 23b connecting part (second connecting part)
24, 24a, 24c, 24d
Projection 25 High-strength bolt 31 Cross-sectional defect 32 Inclined surface (opposing surface)
32d Upright surface (opposite surface)
33 Tapered surface (contact surface)
33d Upright surface (contact surface)
35 Bolt hole 91 Sliding bearing 95 Sliding plate (the other mounting part)
97 Superstructure side sliding plate (one mounting part)

Claims (4)

Of the two attachment parts that move relative to each other, the first connection part that is connected to the other attachment part so as to be fitted in the recess formed in one attachment part is provided with a projecting part or the one Protruding portions are provided on the other attachment portion or the first connection portion connected to the other attachment portion so as to be fitted into the recess formed in the second connection portion connected to the attachment portion. A cross-sectional defect portion is formed in the vicinity of the base end side of the projecting portion so that the projecting portion is broken by a shearing load acting on the projecting portion from the concave portion with relative movement of the two attachment portions. The two contact surfaces that contact the opposing surfaces facing each other along the relative movement direction of the two attachment parts among the inner surfaces of the recesses are provided so as to be back to back on the outer surface of the projecting portion, and The two abutments One of them is a tapered surface, the other is a tapered surface or an upright surface, and at least the connection between the first connection portion and the other attachment portion and the connection between the second connection portion and the one attachment portion. A movement restriction releasing mechanism characterized in that either one is a friction joint by a high-strength bolt inserted into a bolt hole formed in the one attachment part or the other attachment part. A vibration damping device comprising the movement restriction releasing mechanism according to claim 1, wherein the relative movement input parts of the vibration damping device are the one attachment part and the other attachment part, respectively. apparatus. The sliding plate is used as the one mounting portion, the friction plate attached with the friction material sliding on the sliding surface of the sliding member attached to the sliding plate as the other mounting portion, or the friction plate The vibration damping device according to claim 2, wherein the one attachment part is used and the sliding plate is the other attachment part. A sliding bearing provided with the movement restriction releasing mechanism according to claim 1, wherein a relative movement input portion of the sliding bearing is the one mounting portion and the other mounting portion, respectively.

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